Question

if 578x4 is divisible by 3, find the least value of x

Answer 1

We know, if a no is divisible by 3 then sum of all three digits is divisible by 3.

Now, 5 + 7 +8 + x + 4 = 24 +x

Now, 24 is divisible by 3 therefore x = 0 is the least value of x.

Answer 2

0 is min ans for x ....